Now you don't need to turn your sander on and off each time you need to reposition your work.While it sits, you're free to work - and your sandpaper disk gets gently cleaned by the crepe pad. Eliminates 70% - 80% of debris from the disk.Now you don't need to turn your sander on and off each time you need to reposition your work. Instead, let it land on the Sander Sitter! While it sits, you're free to work--and your sandpaper disk gets gently cleaned by the crepe pad.Replacement crepe disk pads are also available, sold separately.